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Home >> Toyota >> 2021 >> C-HR LE >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Supplemental Restraint System - Diagnostic Codes (B1805-B1835) >> Airbag System >> DTC B1825: Short in Side Squib LH Circuit; DTC B1826: Open in Side Squib LH Circuit; DTC B1827: Short in Side Squib LH Circuit (To Ground); DTC B1828: Short in Side Squib LH Circuit (To B+) [09/2019 - ] >> Description

DTC B1825: Short in Side Squib LH Circuit; DTC B1826: Open in Side Squib LH Circuit; DTC B1827: Short in Side Squib LH Circuit (To Ground); DTC B1828: Short in Side Squib LH Circuit (To B+) [09/2019 - ]: Description

The side squib LH circuit consists of the airbag sensor assembly and front seat airbag assembly LH.

The airbag sensor assembly uses this circuit to deploy the airbag when deployment conditions are met.

These DTCs are stored when a malfunction is detected in the side squib LH circuit.

DTC No. Detection Item DTC Detection Condition Trouble Area Test Mode / Check Mode
B1825 Short in Side Squib LH Circuit Any of the following conditions is met:
  • The airbag sensor assembly detects a line short in the side squib LH circuit during the primary check.
  • Side squib LH malfunction
  • Airbag sensor assembly malfunction
  • Floor wire
  • Side squib LH (Front seat airbag assembly LH)
  • Airbag sensor assembly
Applies to check mode
B1826 Open in Side Squib LH Circuit Any of the following conditions is met:
  • The airbag sensor assembly detects an open in the side squib LH circuit.
  • Side squib LH malfunction
  • Airbag sensor assembly malfunction
  • Floor wire
  • Side squib LH (Front seat airbag assembly LH)
  • Airbag sensor assembly
Applies to check mode
B1827 Short in Side Squib LH Circuit (To Ground) Any of the following conditions is met:
  • The airbag sensor assembly detects a short to ground in the side squib LH circuit.
  • Side squib LH malfunction
  • Airbag sensor assembly malfunction
  • Floor wire
  • Side squib LH (Front seat airbag assembly LH)
  • Airbag sensor assembly
Applies to check mode
B1828 Short in Side Squib LH Circuit (To B+) Any of the following conditions is met:
  • The airbag sensor assembly detects a short to B+ in the side squib LH circuit.
  • Side squib LH malfunction
  • Airbag sensor assembly malfunction
  • Floor wire
  • Side squib LH (Front seat airbag assembly LH)
  • Airbag sensor assembly
Applies to check mode
DTC DETECTION CONDITIONS (B1825):

  Vehicle Condition
Pattern 1 Pattern 2 Pattern 3
Diagnosis Condition Ignition switch ON ◦ ◦ ◦
Malfunction Status The airbag sensor assembly detects a line short in the side squib LH circuit during the primary check ◦ - -
Side squib LH malfunction - ◦ -
Airbag sensor assembly malfunction - - ◦
Detection Time - - -
Number of Trips 1 trip 1 trip 1 trip
DTC DETECTION CONDITIONS (B1826):

  Vehicle Condition
Pattern 1 Pattern 2 Pattern 3
Diagnosis Condition Ignition switch ON ◦ ◦ ◦
Malfunction Status The airbag sensor assembly detects an open in the side squib LH circuit ◦ - -
Side squib LH malfunction - ◦ -
Airbag sensor assembly malfunction - - ◦
Detection Time - - -
Number of Trips 1 trip 1 trip 1 trip
DTC DETECTION CONDITIONS (B1827):

  Vehicle Condition
Pattern 1 Pattern 2 Pattern 3
Diagnosis Condition Ignition switch ON ◦ ◦ ◦
Malfunction Status The airbag sensor assembly detects a short to ground in the side squib LH circuit ◦ - -
Side squib LH malfunction - ◦ -
Airbag sensor assembly malfunction - - ◦
Detection Time - - -
Number of Trips 1 trip 1 trip 1 trip
DTC DETECTION CONDITIONS (B1828):

  Vehicle Condition
Pattern 1 Pattern 2 Pattern 3
Diagnosis Condition Ignition switch ON ◦ ◦ ◦
Malfunction Status The airbag sensor assembly detects a short to B+ in the side squib LH circuit ◦ - -
Side squib LH malfunction - ◦ -
Airbag sensor assembly malfunction - - ◦
Detection Time - - -
Number of Trips 1 trip 1 trip 1 trip

HINT: 

DTC will be output when conditions for either of the patterns in the table above are met.